JPH05272805A - Hot water feeding controller - Google Patents

Abstract

PURPOSE:To prevent a boiling at a heat exchanger caused by a lack of flow rate at a heated circuit for a bypass mixing hot water feeder. CONSTITUTION:In the case that a distributing rate for a heated circuit 1 and a bypass circuit 2 is adjusted, a differential pressure between a branched part of two circuits and a merging part is made constant by a water governor. In the case that the bypass rate is increased by performing a simultaneous adjustment of a degree of opening of inlet for each of the circuits from a water feeding circuit, a degree of opening for the heated circuit 1 is enlarged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water supply control device, and more particularly to a hot water supply control device of the type capable of maintaining a hot water discharge temperature at a set temperature by being sensitive to an instantaneous temperature change of the hot water discharge temperature. ..

[0002]

2. Description of the Related Art Various hot water supply control devices capable of maintaining a hot water discharge temperature at a set temperature have been proposed. Recently, the hot water discharge amount is controlled by controlling the combustion gas amount based on the relationship between the hot water discharge temperature and the set temperature. Even if the temperature changes, there is one that allows the hot water temperature to be maintained at the set temperature.

However, such a hot water supply control device cannot cope with a post-boiling phenomenon, a so-called cold water sanding phenomenon in which cold water is temporarily discharged when hot water is again discharged. Therefore, in order to prevent such inconvenience, a bypass mixing method in which the distribution ratio can be adjusted is incorporated, and the distribution ratio can be adjusted according to the outlet temperature change of the heat exchanger. Proposed as No. 3-186150.

In this device, the ratio of the flow rate of the heated circuit passing through the heat exchanger to the flow rate of the bypass circuit not passing through the heat exchanger can be adjusted in the post-boiling phenomenon or the above-mentioned cold water sand state. Therefore, the post-boiling phenomenon and the cold water sand state can be relaxed. However, even with this conventional device, the heat exchanger may be in an abnormally overheated state or the cold water sand prevention effect may be insufficient depending on the conditions.

In order to adjust the distribution ratio between the circuit to be heated and the bypass circuit, in this conventional device, only the flow rate on the bypass circuit side is adjusted. is there. The present invention has been made in view of the above point, and is provided with “a proportional controller for maintaining the outlet heated water temperature at the outlet heated water setting temperature by adjusting the combustion gas amount in accordance with the change in the discharged hot water amount. With
A bypass circuit that bypasses the heat exchanger is provided separately from the circuit to be heated via the heat exchanger, and a flow ratio adjusting device is provided at a branch portion between the circuit to be heated and the bypass circuit, and the heat exchanger outlet of the circuit to be heated is provided. In the hot water supply control device that operates the flow rate ratio adjusting device so as to maintain the temperature at a predetermined heating set temperature, it is possible to prevent an insufficient overflow of the flow rate of the heated circuit and prevent an abnormal overheating state. The task is to do so. [Invention of Claim 1]

[0006]

[Technical Means] The technical means of the present invention for solving the above-mentioned problem is that "a flow rate ratio adjusting device (3) provided at a branch portion between a heated circuit (1) and a bypass circuit (2) is driven. When the device (M) is operated, the first regulating valve (3
1) and the second control valve (32) inserted on the bypass circuit (2) side are adjusted at the same time.
On the upstream side of (3), insert a water governor (4) that sets the differential pressure from the downstream side of the heat exchanger to a constant value, maintain the tap water temperature at the set temperature, and then heat the heat exchanger (10). Calculate the ratio of the opening on the heated circuit (1) side to the opening on the bypass circuit (2) side to maintain the outlet side hot water temperature at a certain temperature higher than the supply water temperature, and respond to this calculated value. A signal output unit (30) that outputs the operation signal to the drive unit (M) is provided, and the relationship between the operation amount of the drive unit (M) and the opening degree of the second adjustment valve (32) is determined by the drive unit (M). The relationship is such that the opening degree of the second adjusting valve (32) gradually increases as the operating amount of the first adjusting valve (3) increases.
The relationship with the opening of 1) is that the opening of the first regulating valve (31) is maintained as the opening remains constant until the operation amount of the drive unit (M) reaches a predetermined value and increases more than that. It was made to gradually increase ”. (See Figure 1)

[0007]

The above technical means operates as follows. The temperature of hot water discharged from the water heater is controlled by the proportional controller so as to be maintained at the set temperature. Then, under this condition, the signal output unit (30) controls the first and second regulating valves (31) (32) so that the temperature on the outlet side of the heat exchanger (10) becomes a value higher than the feed water temperature by a constant temperature. ) Is set.

At this time, except when the incoming water temperature is low and the set temperature is high, in order to maintain the temperature on the outlet side of the heat exchanger (10) at the above value, the flow rate on the heated circuit (1) side Is preferably set to be constant regardless of the bypass flow rate. Even when the condition for increasing the bypass flow rate ratio is set, if the opening degree of the first regulating valve (31) is constant until the bypass flow rate ratio reaches a predetermined value, the heated circuit (1) side The flow rate is kept constant. This is because the water governor (4) maintains a constant pressure difference between the inlet side and the confluence of the heated circuit (1) and the bypass circuit (2). However, when the flow rate ratio on the bypass circuit (2) side increases, even if the differential pressure is constant, the flow rate on the heated circuit (1) side is suppressed due to the increase in resistance at the confluence point, which tends to occur. Becomes However, in the above configuration, the first regulating valve (31) is operated under such conditions.
Since the opening is set to increase, the phenomenon tendency is eliminated and the flow rate on the heated circuit (1) side is maintained constant.

[0009]

[Effect] Since the flow rate of the circuit to be heated (1) does not become insufficient, the amount of water heated by the heat exchanger (10) becomes too small and the heat exchanger (10) becomes anomalous near the boiling phenomenon. The inconvenience of being heated can be prevented. Further, the above state can be secured promptly after the start of hot water supply. [Invention 2] According to the invention of Claim 1, the hot water at the preset temperature can be reliably taken out even under conditions of low incoming water temperature and high preset hot water temperature. The purpose is to significantly reduce the cold water sand phenomenon.

[0010]

[Technical Means] The technical means of the present invention for solving the above-mentioned problem is that "a flow rate ratio adjusting device (3) provided at a branch portion between a heated circuit (1) and a bypass circuit (2) is driven. When the device (M) is operated, the first regulating valve (3
1) and the second control valve (32) inserted on the bypass circuit (2) side are adjusted at the same time.
On the upstream side of (3), insert a water governor (4) that sets the secondary pressure on the downstream side to a constant value, maintain the hot water temperature at the set temperature, and then heat the hot water at the outlet side of the heat exchanger (10). To maintain the temperature at a constant temperature higher than the feed water temperature, calculate the ratio of the opening on the heated circuit (1) side to the opening on the bypass circuit (2) side, and set the operation signal according to this calculated value. Signal output part (3
0) is provided, and the relationship between the operation amount of the drive unit (M) and the opening degree of the second adjustment valve (32) is the second value until the operation amount of the drive unit (M) reaches the set operation amount from 0 point. When the adjustment valve (32) is closed and the set operation amount is exceeded, the opening of the second adjustment valve (32) gradually increases, and the operation amount of the drive unit (M) and the 1 The relationship with the opening of the adjusting valve (31) is that the opening of the first adjusting valve (31) has a constant flow rate in the range where the operation amount of the drive unit (M) is equal to or more than the set operation amount. The opening degree of the first regulating valve (31) is gradually decreased as the operation amount of the drive unit (M) is decreased within a range where the operation amount is maintained below the set operation amount.

[0011]

[Operation / Effect] The above technical means operates as follows.
The incoming water temperature exiting low water set temperature to the heat exchanger (10), such as winter high condition, even heat exchanger heating amount by the gas burner is set to the maximum value, the hot water temperature is set higher enough I can't get enough hot water. Under such conditions, the opening of the first regulating valve (31) is set to be equal to or lower than the set opening by the signal output unit (30) so that the temperature on the outlet side of the heat exchanger (10) is more constant than the feed water temperature. The temperature is reduced to a high value. That is, a predetermined degree of increase in heating by the heat exchanger (10) can be secured even under conditions of low incoming water temperature.

In a state where the incoming water temperature is high and the heating amount of the heat exchanger by the gas burner has a margin, the same operation as in the first aspect of the invention is effected, and the gas is heated while passing through the heat exchanger (10). The flow rate is always maintained at a constant value. That is, there is no excess or deficiency in the flow rate of the heated circuit (1). Therefore, the tap water temperature is reliably ensured under conditions of low incoming water temperature and high set temperature, and the flow rate in the heated circuit (1) does not become excessive. Inconvenience can also be prevented.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the embodiments of the present invention described above will be described in detail with reference to the drawings starting from FIG. In this embodiment, as shown in FIG. 2, the water supply circuit (40) includes a heated circuit (1) via a heat exchanger (10) and a bypass circuit bypassing the heat exchanger (10).
It is divided into (2) and the flow ratio adjusting device (3) at the branch of the heated circuit (1) and the bypass circuit (2).
In the water supply circuit to this flow ratio controller (3), there is a water temperature sensor (T ₀ ) that detects the temperature of the water, and the confluence of the heated circuit (1) and the bypass circuit (2). A hot water temperature sensor (T ₂ ) for detecting the hot water temperature is provided on the downstream side of (N).

The combustion amount of the gas burner (B) corresponding to the heat exchanger (10) is controlled by the gas proportional valve (G). Therefore, in this embodiment, a so-called feedback type gas proportional controller (C) shown in FIG. 7 is adopted. This gas proportional control device (C) compares the output of the setting device (S) that sets the hot water temperature with the detection output of the hot water temperature sensor (T ₂ ) to determine the degree of opening to the gas proportional valve (G). The signal is calculated and the signal output corresponding to this calculated value is applied to the gas proportional valve (G). Since the configuration at this point is well known, detailed description will be omitted.

The flow rate adjusting device (3), which is the main component of this embodiment, comprises a first adjusting valve (31) for adjusting the opening of an inlet (11) to the heated circuit (1) and a bypass circuit. The drive device (M) for simultaneously driving the second adjusting valve (32) for adjusting the opening degree of the inlet part (21) to (2), the detection output of the above-mentioned incoming water temperature sensor (T ₀ ), and the hot water temperature sensor (T ₂ ) detection output, and a signal output section (30) for inputting an output corresponding to a set temperature and outputting a predetermined operation signal, the first adjusting valve (31) and the second adjusting valve (32) is built in the valve device main body (V), and the first adjusting valve (31) and the second adjusting valve are provided in the valve device main body (V) from the inlet (41) of the water supply circuit (40). A water governor (4) with a circuit inserted into the valve chamber (33) accommodating (32) is built in, and the secondary side empty chamber (43a) partitioned by the diaphragm (42) is a bypass circuit (2). It is connected to the side.

The water governor (4) serves to keep the pressure difference between the pressure in the chamber (43a) and the chamber (43b) communicating with the valve chamber (33) constant. Therefore, from the empty room (43b),
As long as the resistance to the confluence (N) between the heated circuit (1) communicating with (43a) and the bypass circuit (2) is constant, the flow rate on the downstream side will not be affected by the difference above regardless of the fluctuation of the primary pressure. It is a constant flow rate determined by the pressure.

Further, the first adjusting valve (31) and the second adjusting valve (3
2) is a valve shaft (34) which is built in the valve device main body (V) so as to rotate integrally with the output part of the drive device (M) and penetrates the valve chamber (33) as shown in FIG. Driven by this valve stem (34)
Are integrally connected to a screw shaft (35) provided at the axial end portion of the valve chamber (33), and this screw shaft forms a pair with the output portion of the drive unit (M). Therefore, the valve shaft (34) rotates by the same angle according to the rotation angle of the output portion of the drive unit (M), and moves back and forth in the axial direction.

The first adjusting valve (31) is fixed to the valve shaft (34) and is housed in a cylindrical pair state with respect to the valve chamber (33). The degree of blockage of the inlet portion (11) changes according to The other second adjusting valve (32) has a valve shaft (34)
It has a shape of a rotating body integrally connected with and rotates like the valve shaft (34) and moves back and forth in the axial direction. As shown in FIG. 4, the first regulating valve (31) has a columnar shape and its end face faces the inlet portion (11). This end face is set in a predetermined shape. The rotation angle of the output part of the drive unit (M) is set to 270 degrees, and the rotation angle of the drive unit (M) is 0 degrees to 90 degrees depending on the end face shape of the first adjusting valve (31). Up to 90 degrees, the opening of the inlet (11) increases proportionally.
The opening of 1) is set to be constant. Therefore,
When the faucet (J) provided in the tap water circuit is in the fully open state, the flow rate of the heated circuit (1) shows the change shown in FIG.

On the other hand, the second adjusting valve (32) is fitted onto the valve shaft (34) so as to have a certain range of movement in the axial direction.
This movement allowance is set to 1/3 of the axial movement amount of the valve shaft (34) due to the rotation of the output portion of the drive unit (M) by 270 degrees. The tip end facing the inlet part (21) is a truncated cone part, and the flange part is continuous to this, and the diameter of this flange part is larger than that of the inlet part (21). There is. Further, the second adjusting valve (32) has a spring (36).
Is urged toward the inlet portion (21) by the rotation angle of the output portion of the drive unit (M) exceeds 90 degrees, the truncated cone portion is inserted into the inlet portion (21). .. Further, the shape of the truncated cone is preset to a predetermined shape, and the opening of the inlet (21) is proportional to the range of the rotation angle of the drive unit (M) from 0 to 90 degrees. Increase. This allows
When the faucet (J) provided in the tap water circuit is in the fully open state, the flow rate of the heated circuit (1) changes as shown in FIG.

By setting the first adjusting valve (31) and the second adjusting valve (32) as described above, the total flow rate is
When (J) is in the fully open state, it is set to change as shown in FIG. Also, the ratio of the flow rate on the bypass circuit (2) side to the flow rate on the heated circuit (1) side, that is, the bypass flow rate ratio, changes as shown in Fig. 6 regardless of the opening of the faucet (J). It will be.

Water pressure flowing into the valve chamber (33) by the water governor (4) and a confluence of the heated circuit (1) and the bypass circuit (2).
The pressure difference with the water pressure at (N) is set to be constant regardless of the water pressure fluctuation in the water supply circuit (40), and the inlet (11) and the inlet (2
This is because the opening degrees of 1) are adjusted together to adjust the bypass flow rate ratio. Next, the signal output section (30)
Will be described.

This signal output section (30) is provided with a water temperature sensor (T ₀ ).
And detection output, is input to the signal from the hot water temperature setting unit (S), the entering water temperature sensor (T ₀₎ of the detected value to the corresponding temperature (T
The first calculation unit (30a) that calculates the value obtained by subtracting the set temperature (S ₁ ) of the tap water temperature setting device (S) from the value obtained by adding 50 ° C to ( ₀₁ ).
And a second calculation unit (30b) for calculating a value obtained by subtracting the temperature (T ₀₁ ) from the set temperature (S ₁ ), and these first and second calculation units
(30a) Composed of a ratio of output signals from (30b) and a rotation angle signal setting unit (30C) for setting a rotation angle signal of the output unit of the drive unit (M) based on the bypass ratio of FIG. To be done. Then, the output signal of the rotation angle signal setting unit (30C) is input to the drive unit (M).

In this case, the opening of the gas proportional valve (G) is controlled by the gas proportional control device (C) so that the hot water outlet temperature becomes the set temperature (S ₁ ) by the hot water outlet temperature setting device (S). It
Once the flow rate, set temperature, incoming water temperature, and heat efficiency of the heat exchanger are determined, as long as the gas type is constant, the gas burner
The heating amount by (B) depends on the heated circuit (1) and the bypass circuit.
Since it has a constant value regardless of the distribution ratio with (2), the hot water outlet temperature becomes the hot water outlet set temperature by setting the opening of the gas proportional valve (G) by the gas proportional control device (C). Then, the above operation is executed by so-called feedback control in order to accurately match the outlet heated water temperature with the set temperature.

Next, in the signal output section (30), the heat exchanger (10)
The rotation angle signal for setting the outlet temperature of the hot water outlet to a temperature higher than the detected temperature of the incoming water temperature sensor (T ₀ ) by, for example, 50 ° C. and maintaining the hot water outlet temperature at the set temperature (S ₁ ) is calculated. If the set temperature (S ₁ ) is once set to a predetermined temperature, the amount of water supplied is constant, and the outlet temperature of the heat exchanger (10) is 50 ° C higher than the temperature detected by the water temperature sensor (T ₀ ). For example, the flow rate ratio between the heated circuit (1) and the bypass circuit (2) is "(S ₁ )-(T ₀₁ )" and "(T ₀₁ ) +
50- (S ₁ ) ”.

In this embodiment, the ratio of the output of the second arithmetic unit (30b) and the output of the first arithmetic unit (30a) is the above value.
Therefore, the bypass ratio set by the turning angle signal setting unit (30C) meets the above conditions. In the state where the bypass ratio is set in this way, the above control operation by the combination of the gas proportional control device (C) and the gas proportional valve (G) proceeds.

In the case of the control of the above embodiment, the heated circuit (1)
Since the flow rate on the side is such that the temperature at the outlet side of the heat exchanger (10) is maintained at a temperature 50 ° C higher than the incoming water temperature, it is assumed that the heat exchanger (10) does not have excess or insufficient heating. Become. Particularly in the above-mentioned embodiment, the confluence part communicating with the empty chamber (43a)
(N) is controlled so that the differential pressure between the valve chamber (33) communicating with the empty chamber (43b) is constant, and the opening of the first regulating valve (31) changes as shown in FIG. Therefore, when the bypass ratio is increased, the circuit to be heated changes.
The situation where the flow rate of (1) becomes too small can be prevented.

Even when the incoming water temperature is low and the set temperature is high, the flow rate on the bypass circuit (2) side is set to 0 and the circuit to be heated is set.
Since the flow rate on the (1) side can be controlled so as to be throttled, hot water with a high set temperature can be taken out while preventing drainage and overheating. In the above embodiment, the first adjusting valve (31) changes its opening degree as shown in FIG. 5 due to its rotation.
A configuration as shown in FIGS. 9 and 10 can also be adopted. In this case, the first regulating valve (31) is a cylindrical body that moves in the axial direction. And the semicircular entrance part (1
1a) and a round hole (11b) are formed, and the inlet part (11a) gradually opens from a partially closed state to a fully open state up to a rotation angle of 90 degrees of the screw shaft (35). In the range of 90 ℃ ~ 270 ℃, so that both the inlet (11a) and the round hole (11b) fully open in the range of 90 ℃ ~ 270 ℃, Screw shaft (35) and first adjusting valve (31)
The interlocking relationship with is set.

The flow rate when the inlet portion (11a) and the round hole (11b) are both fully opened is set to show the maximum value in FIG. 5 when the faucet (J) is fully opened. ..

[Brief description of drawings]

FIG. 1 is an explanatory diagram of the principle of the present invention.

FIG. 2 is a schematic explanatory view of an embodiment of the present invention.

FIG. 3 is a detailed view of the relationship between the first adjusting valve (31) and the second adjusting valve (32).

FIG. 4 is a perspective view of a first adjusting valve (31).

FIG. 5: When the faucet (J) is fully open, the first regulating valve (31)
And the second adjusting valve (32) are adjusted at the same time, the screw shaft (3
5) Graph of the relationship between the rotation angle and the flow rate

FIG. 6 is a graph showing the relationship between the rotation angle of the screw shaft (35) and the bypass flow rate ratio.

FIG. 7: Block diagram of gas proportional controller (C)

FIG. 8 is a block diagram of a signal output unit (30).

FIG. 9 is a sectional view of another example of the first regulating valve (31).

FIG. 10 is a sectional view taken along line XX.

[Explanation of symbols]

 (1) ・ ・ ・ Heated circuit (2) ・ ・ ・ Bypass circuit (3) ・ ・ ・ Flow rate adjusting device (M) ・ ・ ・ Drive device (31) ・ ・ ・ First adjusting valve (32) ・ ・・ Second adjusting valve (4) ・ ・ ・ Water governor (30) ・ ・ ・ Signal output section

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[Procedure amendment]

[Submission date] June 3, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0002

[Correction method] Change

[Correction content]

[0002]

2. Description of the Related Art Various hot water supply control devices capable of maintaining a hot water discharge temperature at a set temperature have been proposed. Recently, the hot water discharge amount is controlled by controlling the combustion amount based on the relationship between the hot water discharge temperature and the set temperature. For example, there is one that allows the hot water outlet temperature to be maintained at the set temperature even if it changes.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction content]

In order to adjust the distribution ratio between the circuit to be heated and the bypass circuit, in this conventional device, only the flow rate on the bypass circuit side is adjusted. is there. The present invention has been made in view of the above point, and “provides a proportional control device for maintaining the outlet heated water temperature at the outlet heated water setting temperature by adjusting the combustion amount according to the change in the discharged water amount. A heat exchange circuit of the circuit to be heated, a bypass circuit bypassing the heat exchanger is provided separately from the circuit to be heated via the heat exchanger, and a flow ratio adjusting device is provided at a branch portion between the circuit to be heated and the bypass circuit. In the hot water supply control device that operates the flow rate adjusting device so as to maintain the outlet temperature at a predetermined heating set temperature, it is possible to prevent an insufficient overflow of the flow rate of the heated circuit and prevent an abnormal overheating state. The task is to be able to do so. [Invention of Claim 1]

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction content]

[0011]

[Operation / Effect] The above technical means operates as follows.
Under conditions such as winter when the temperature of incoming water to the heat exchanger (10) is low and the set hot water temperature is high, it is sufficient if the hot water temperature is set high even if the heat exchanger heating amount by the burner is set to the maximum value. I can't get enough hot water. Under these conditions, the signal output unit (30) causes the first adjusting valve (3
The opening of 1) is within the set opening, and the heat exchanger (10)
The outlet side temperature is narrowed to a value that is a certain temperature higher than the feed water temperature. That is, a predetermined degree of increase in heating by the heat exchanger (10) can be secured even under conditions of low incoming water temperature.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

When the temperature of the incoming water is high and there is a margin in the heating amount of the heat exchanger by the burner, the same operation as in the first aspect of the invention is effected, and the heating is performed while passing through the heat exchanger (10). The flow rate is always maintained at a constant value. That is, there is no excess or deficiency in the flow rate of the heated circuit (1). Therefore, the tap water temperature is surely secured under the condition that the incoming water temperature is low and the set temperature is high, and the flow rate of the heated circuit (1) does not become excessive. Therefore, the cold water sand state continues for a long time when tapping hot water again. Inconvenience can also be prevented.

Claims (2)

[Claims] 1. A proportional control device for maintaining the outlet heated water temperature at the outlet heated hot water set temperature by adjusting the amount of combustion gas in response to changes in the amount of discharged hot water, and a circuit to be heated through a heat exchanger. Separately, a bypass circuit bypassing the heat exchanger is provided, and a flow rate ratio adjusting device is provided at a branch portion between the heated circuit and the bypass circuit to maintain the heat exchanger outlet temperature of the heated circuit at a predetermined heating set temperature. As described above, in the hot water supply control device that operates the flow rate adjusting device, the flow rate adjusting device (3) provided at the branch portion between the heated circuit (1) and the bypass circuit (2) is a driving device. By the operation of (M), the opening degree of the first regulating valve (31) inserted on the heated circuit (1) side and the second regulating valve (32) inserted on the bypass circuit (2) side is adjusted simultaneously. The upstream side of this flow ratio controller (3) is connected to the downstream side of the heat exchanger. Insert a water governor (4) to set the differential pressure of the pump to a constant value, maintain the tap water temperature at the set temperature, and then maintain the hot water temperature at the outlet side of the heat exchanger (10) at a constant temperature higher than the feed water temperature. For calculating the ratio of the opening on the heated circuit (1) side to the opening on the bypass circuit (2) side and outputting an operation signal corresponding to this calculated value to the drive unit (M) ( 30) is provided, the operation amount of the drive unit (M) and the second adjusting valve (32)
The opening degree of the drive device (M) is gradually increased as the operation amount of the drive device (M) is increased. As for the relationship with the opening degree of the first adjusting valve (31), the first adjusting valve (31) is maintained as the opening degree is kept constant and increases until the operation amount of the drive unit (M) reaches a predetermined value. Hot water supply control device in which the opening degree of the hot water supply is gradually increased. 2. A proportional control device for maintaining the outlet heated water temperature at the outlet heated water setting temperature by adjusting the amount of combustion gas in response to changes in the discharged hot water amount, and a circuit to be heated via a heat exchanger. Separately, a bypass circuit bypassing the heat exchanger is provided, and a flow rate ratio adjusting device is provided at a branch portion between the heated circuit and the bypass circuit to maintain the heat exchanger outlet temperature of the heated circuit at a predetermined heating set temperature. As described above, in the hot water supply control device that operates the flow ratio adjusting device, the flow ratio adjusting device (3) provided at the branch portion between the heated circuit (1) and the bypass circuit (2) is a driving device. By the operation of (M), the opening of the first regulating valve (31) inserted on the heated circuit (1) side and the second regulating valve (32) inserted on the bypass circuit (2) side is adjusted at the same time, The secondary pressure on the downstream side should be connected to the upstream side of the flow rate ratio controller (3). Water governor set to constant
(4) is inserted to maintain the hot water temperature at the set temperature and the hot water temperature at the outlet side of the heat exchanger (10) at a constant temperature higher than the feed water temperature. The drive device (M) is provided with a signal output section (30) that calculates the ratio between the opening and the opening on the bypass circuit (2) side and outputs an operation signal according to the calculated value to the drive (M). The relationship between the operating amount of the control valve and the opening of the second adjusting valve (32) is that the second adjusting valve (32) is closed until the operating amount of the drive unit (M) reaches the set operating amount from 0 point. Even if the set operation amount is exceeded, the opening of the second adjusting valve (32) gradually increases, and the operation amount of the drive unit (M) and the first
The relationship with the opening of the adjusting valve (31) is that the opening of the first adjusting valve (31) is such that a constant flow rate is maintained in the range where the operation amount of the drive device (M) is equal to or more than the set operation amount. A hot water supply control device in which the opening of the first regulating valve (31) is gradually reduced as the operation amount of the drive unit (M) is decreased within a range of being maintained in the state and below the set operation amount.